Revert "Merge pull request #100 from square/cheister/checkout-only-ref-we-need"
Revert "Merge pull request #100 from square/cheister/checkout-only-ref-we-need"

This reverts commit 3ab6189fc366ec0532026e5d218e8def536d5f8d, reversing
changes made to e6cd702a99f5d8e5ec2e8d6382461d4c2d7401a0.

square/kochiku,square/kochiku,rudle/kochiku,rudle/kochiku,IoraHealth/kochiku,moshez/kochiku,moshez/kochiku,rudle/kochiku,square/kochiku,moshez/kochiku,rudle/kochiku,IoraHealth/kochiku,IoraHealth/kochiku,square/kochiku,moshez/kochiku